Lymphocyte Thymus dependent

Thymus-dependent lymphocytes are a type of T lymphocyte that recognizes foreign substances in the body and helps it fight infection or tumor. They undergo a complex maturation process in the thymus, an organ located in the chest and responsible for the production of immunity. However, not all lymphocytes undergo this maturation process; they are considered immature. These cells can be called "thymus-independent" lymphocytes or activated lymphocytes. Thymus-dependent lymphocytes are a subgroup of immature lymphocytes that receive induction for activation by the thymus. Activation of thymus-dependent lymphocytes occurs through antigen receptors located on their surface. This phenomenon is called activation in the presence of antigen, and without it it is simply passive activation. They lack antigen-independent activation factors (eg, cytokines).